package servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import beans.Student;

import actionManager.StuManager;

public class doStuLogin extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public doStuLogin() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		HttpSession session = request.getSession();
		String toJsp = "../student/stuLogin.jsp";
		
		if(session.getAttribute("studentId")== null){
			String stu_id = request.getParameter("stu_id");
			String stu_passwd = request.getParameter("stu_passwd");
			System.out.println("stu_id = "+stu_id+"\nstu_passwd = "+stu_passwd);
			StuManager smg = StuManager.getInstance();
			Student student = smg.isValidStudent(stu_id, stu_passwd);
			if(student != null){
				System.out.println("Student" + student.getName()+ "Login!");
			}
		}
		
		//RequestDispatcher dispatcher = request.getRequestDispatcher(toJsp);
		//dispatcher.forward(request, response);
		response.sendRedirect(toJsp);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
